 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui.views.tasklist;

 import java.util.ArrayList ;
 import java.util.Map ;

 import org.eclipse.core.resources.IMarker;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IWorkspaceRunnable;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.jface.dialogs.ErrorDialog;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.ide.undo.CreateMarkersOperation;
 import org.eclipse.ui.ide.undo.WorkspaceUndoUtil;
 import org.eclipse.ui.internal.views.tasklist.TaskListMessages;
 import org.eclipse.ui.part.MarkerTransfer;

 /**
  * Standard action for pasting tasks from the clipboard.
  * <p>
  * This class may be instantiated; it is not intended to be subclassed.
  * </p>
  *
  * @since 2.0
  */
 class PasteTaskAction extends TaskAction {

     /**
      * Creates a new action.
      *
      * @param tasklist the task list
      * @param id the id
      */
     public PasteTaskAction(TaskList tasklist, String id) {
         super(tasklist, id);
         PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
                 ITaskListHelpContextIds.PASTE_TASK_ACTION);
     }

     /**
      * Implementation of method defined on <code>IAction</code>.
      */
     public void run() {
         // Get the markers from the clipboard
 MarkerTransfer transfer = MarkerTransfer.getInstance();
         final IMarker[] markerData = (IMarker[]) getTaskList().getClipboard()
                 .getContents(transfer);

         if (markerData == null) {
             return;
         }

         final ArrayList newMarkerAttributes = new ArrayList ();
         final ArrayList newMarkerResources = new ArrayList ();

         try {
             getTaskList().getWorkspace().run(new IWorkspaceRunnable() {
                 public void run(IProgressMonitor monitor) throws CoreException {
                     for (int i = 0; i < markerData.length; i++) {
                         // Only paste tasks
 if (!markerData[i].getType().equals(IMarker.TASK)) {
                             continue;
                         }
                         newMarkerResources.add(markerData[i].getResource());
                         newMarkerAttributes.add(markerData[i].getAttributes());
                     }
                 }
             }, null);
         } catch (CoreException e) {
             ErrorDialog.openError(getShell(), TaskListMessages.PasteTask_errorMessage,
                     null, e.getStatus());
             return;
         }
         
         final Map [] attrs = (Map []) newMarkerAttributes.toArray(new Map [newMarkerAttributes.size()]);
         final IResource [] resources = (IResource []) newMarkerResources.toArray(new IResource [newMarkerResources.size()]);
         final CreateMarkersOperation op = new CreateMarkersOperation(IMarker.TASK, attrs,
                 resources, getText());
         execute(op, TaskListMessages.PasteTask_errorMessage, null,
                 WorkspaceUndoUtil.getUIInfoAdapter(getShell()));

         // Need to do this in an asyncExec, even though we're in the UI thread here,
 // since the task list updates itself with the addition in an asyncExec,
 // which hasn't been processed yet.
 // Must be done outside the create marker operation above since notification for add is
 // sent after the operation is executed.
 if (op.getMarkers() != null) {
             getShell().getDisplay().asyncExec(new Runnable () {
                 public void run() {
                     TaskList taskList = getTaskList();
                     taskList.setSelection(new StructuredSelection(op.getMarkers()),
                             true);
                 }
             });
         }
     }

 }


